Double slit Definition and 802 Threads

I read that quantum particles (like photons) travel as waves of probability, but when they encounter other quantum particles, the probability waves break down, and the photons assume properties of particles. An example given of this is: if you fire a single photon from point A, to a point B...

Just a bit confused/ need confirmation of what's happening. We shine light at the double slit and see interference patterns. Place two opposite 1/4 waves plate, so that we have which way information, in front of the slits. This causes the pattern to disappear. 1. Under what condition does...

What is the force that acts on a photon that causes its path to deflect when the second slit of the double slit experiment is opened? Assuming that my understanding of the experiment is in the ball park. With one slit open the photon lands in one place but with two slits open it lands in...

Homework Statement Coherent light is passed through two narrow slits whose separation is d. The second-order bright fringe in the interference pattern is located at an angle of theta. If electrons are used instead of light, what must the kinetic energy of the electrons be if they are to...

Homework Statement In a Youngs dbl. slit experiment using green light the fringe width was observed to be 0.20mm.if red light replaces green light,what will be the fringe width? Homework Equations hmm lambda=ay/d but (no info is given on rest)=/ wavelengths:green=5.2x10^-7m...

Lets say that I were to perform the double slit experiment so that at anyone time only a single photon passes through the double slit at a time. Now let's say that I were now to place a polaroid film over each of the slits so that each piece of the film was orthogonal to the other. Now in front...

Can anyone direct me to any version of the double-slit experiment which used only electrons with aligned spin axes? If you can't direct me to an experiment, can you postulate how or if the double-slit experiment might be different using such electrons? Thanks!

As I'm not learning quantum mechanics formally in a classroom, I have no real experience with the matter, or a teacher to whom I can pose my questions. There are a few experiments I'd like to run as well, but no way to do so. In any case, I'm hoping that someone else has run these experiments...

Homework Statement Light from a helium-neon laser (wave length 633 nm) is used to illuminate two narrow slits. The interference pattern is observed on a screen 3.1 m behind the slits. Twelve bright fringes are seen, spanning a distance of 50 mm What is the spacing, in mm, between the slits...

I need to recreate this experiment. It doesn't have to be exactly the same, nor does it have to use very high tech and expensive equipment, it just has to be able to demonstrate interference patterns created by light. I cannot find any specifications on how to build this experiment, and I don't...

I was hoping to get some comments on my interpretation of the double slit experiment. I realize that this is a bit long, and probably not worth the effort to read, much less reply, but if anyone cares to give me some feedback, I'd appreciate it. I'm trying to wrap my brain around the whole...

S1 and S2 are two coherent sources of light in a Young's two slit experiment separated by a distance 0.50mm, and O is a point equidistant from S1 and S2. O is on screen A which is 0.80m from the slits. When a thin parallel-sided piece of glass G of thickness 3.6*10^-6 m is placed near S1...

I have a very basic question about the double slit experiment. Some websites that I have seen state that the simple act of measuring which slit the particle goes through, is enough to collapse the wave function, and it isn't necessary for anyone to actually observe the results of that...

Hi A question that came up today that I do not know how to answer. We were discussing (High School) the double slit experiment and that electrons show interference patterns too. A student asked if the thickness of the double slit slide mattered. ie if the slits were a metre deep ... would...

I have a problem with the outcome of the Double Slit experiment , in that it was concluded that when under observation the electron particles behaved differently to when not directly under observation - conclusivly stating that it was the ACT of observing that changed the electron behaviour in...

Homework Statement In a youngs double slit experiment,if the slit widths are in the ratio 1:2,the ratio of intensities at maxima and minima will be ? Homework Equations The Attempt at a Solution

I've been thinking about the double slit experiment - the one with single photons going thru two slits forming an interference pattern never the less. Now, one thing i was unable to find clarification for is the claim that placing a detector even in just one of the slits to find out thru...

1. Homework Statement the two slit of a double slit each have a width of 0.140mm and a distance between centers of 0.840mm. what the approximate intensity of orders m=o to m=6? 2. Homework Equations i want to use the I/Io = (E/Eo)^2 but some book use I = 4Ao^2sin^2...

Homework Statement In a Young's double slit experiment the width of each slit is a, the distance between the centers of the slits is d, and the 10th interference maximum to the right of the central maximum is the first missing maximum. a) Find the ratio of the slit separation distance to the...

Homework Statement White light spans the wavelength range be- tween about 400 nm and 700 nm. If white light passes through two slits 0.656 mm apart and falls on a screen 1.7 m from the slits, what is the distance between the first-order violet and the first-order red fringes? Answer...

We will not get an interference right? Why? Because the electron interacts with the system? Or the "measurement" forces the wave function to collapse? What if we put a black cloth on the chamber and only see the photographic film? What if we place the chamber before the slits. What if we bring...

Am I correct in thinking that the act of observing which slit a "particle" goes through causes the wave function to collapse, ergo making the source of the "particle" we detect on the back screen to actually be on our detection side of the slits rather than the emitter side? I've drawn it, in...

I'm thinking about using two slits, a webcam and a laser to calculate distances for a project. Usually you measure the distances between maxima but this can be easily measured in a dark room using Matlab and it's image processing routines. I can create the slits and accurately measure them...

Hello, I'm wondering how the two slit experiment interacts with entanglement. Here's an ascii art picture of the standard two slit experiment: | | | | #...

So, after reading a few different explanations of the double slit experiment, there is one aspect I am confused about. The set up is that you shoot out electrons/photons/whatever at a wall with two small slits. The particles pass through one slit, the other, or both if you're not looking...

Two lasers are shining on a double slit, with slit separation . Laser 1 has a wavelength of , whereas laser 2 has a wavelength of . The lasers produce separate interference patterns on a screen a distance 5.80 away from the slits. Part A Which laser has its first maximum closer to the...

hi, I'm new to this forum and mainly because i have some questions regarding a book i am reading. Brian Greene's The Elegant Universe: Superstrings, Hidden Dimensions, and the Quest for the Ultimate Theory mainly he explains the view that Feynman have on the double slit experiment as...

If you send a photon towards some wall it will bounce back (or in some cases be absorbed), why don't the photons bounce back if you shoot photons at the middle of the double slit experiment? Do the photons have to be released at "random", and not in the middle? How's the experiment performed...

Homework Statement I apologize for the blurriness in my title, I couldn't find anything better to fit within the length limit. The problem I'm stuck with, paraphrased, is to derive the formula for the diffraction pattern of a double slit, as found in the Young experiment, from the Fraunhofer...

I propose a setup to distinguish between the quantum interpretation and the wave interpretation of the double slit experiment. Briefly, they are: Quantum The photon gun fires a photon that travels through either slit A or slit B, then hits a detector cell registering a spot in the...

Homework Statement We have the wavelength of 550nm and the distance (d) of 0.120mm. I need to calculate the the angle q. The diffirent parts of this questions corresponds to the diffirent order of n. a) Being n=1 b) n=5 c) n=10 Given variables; Wavelength = 550nm = 550*10^-9m d=0.120mm...

Suppose an observer is moving at some constant velocity(<< c) and observing the young's double slit experiment. What changes will it observe compared to an observer at rest? This is what i could make out : 1) The wavelength of incoming light will change (doppler effect) 2) By the intuition...

Double slit experiment --WHAt is it it showing or proving Im just not getting the general concept of what this experiment proves. Please explain in very simple language --thanks!

Excuse me for patting myself on the back here but I just did my first successful double slit experiment. And it was easy! I poked 2 small holes in aluminum foil just as close as I could and shined my kid’s cheap red laser through them and Viola! I thought I needed razors and prisms and 2 lasers...

Hi guys, I am new to this site and would like to say a little about the double slit experiment. I find the fact that the electrons or photons choose both paths unless being watched absolutely amazing. But what I find even more amazing to me is this: The electrons, when fired at the screen one...

Homework Statement A double slit is composed of two single slits. Each slit has a width of w = 0.01 mm and they are spaced s = 0.04 mm apart. Because the double slit is actually two single slits, the single slit diffraction pattern is superimposed over the double slit pattern and so some...

Has anyone heard of anyone trying to conduct the double slit experiment with a barrier between the two slits that goes all the way or near the detector? If it could be done maybe it would be interesting to see the result. It may answer the question if the photon (or electron) is interferring...

Gday, I am having some trouble with these questions becuase i was away for the two weeks when we did them any help or explanation would be greatly appreciated. 1) A transmitter drivest wo radio antenna A and B placed 2\lambda appart. Each atenna emit radio waves, in phase, uniformly in all...

I am reading The Elegant Universe by Brian Greene. It is really wonderful, however, I am confused by a section about Feynman's view on the double slit expiriment. Greene writes: "Feynman proclaimed that each electron that makes it through to the phosphorescent screen actually goes through...

the double slit interference experiment is set up and the fringes are displayed on screen. Then the whole apparatus is immersed in the nearest swimming pool. How does the fringe pattern change?? Which website I can get information?? Thanks.

Young's double slit experiment produces regular intervals of bright fringes and dark fringes. The bright fringes happen when the 2 sources of wave are in phase and superimpose while the dark fringes are produced when the 2 waves are in antiphase and vectorially cancel each other out. However...

So I'm embarking through Brian Greene's magnificent book The Fabric of The Cosmos and in the quantum section he goes through the whole idea about how observation of a particle leads to collapse of the wavefunction into a definite location. He also uses the double slit experiment for photons and...

Have any experiments been conducted that explore the state of consciousness of the observer in the double slit experiment? My understanding of the double slit experiment is this. Shoot one photon at a time through a slit and you get a line of light (particle model). Shoot single photons...

Homework Statement A double-slit with a separation of 2.1 μm is used with white light. Find the angular width of the first bright fringe between the violet (lviolet = 400 nm) and red (lred = 750 nm) end of the spectrum. (Assume two significant digits.) Homework Equations What exactly...

It seems physicists have come to the conclusion that a single electron travels through both slits at the same time, otherwise there wouldn't be an interference pattern when only one electron is being sent through the apparatus. Apparently this experiment has been done in real life. You can't...

1. The photograph shows the interference pattern produced when monochromatic light falls on a pair of slits. I cannot post links yet but the photo is of a typical fringe pattern produced by coherent light waves from a double slit. Mark with an X on the photograph the fringe or fringes...

hey everybody, I am doing a physics project on the double slit experiment. (I know all the physics and math behind it so don't get into that stuff :P) I was just wondering if people had any suggestions on how to conduct the experiment, I was thinking of cutting two extremely small (knife blade)...

Hi I would really appreciate if someone could answer what maybe a really simple question. I'm no physics expert but I do read a lot and I have a keen interest. My question is related to light interference and the double slit experiment. I know that by observing which slit a photon of...

This might sound very basic but... when the electron passes through the two slits and we see the 'pretty' interference pattern on the opposite side what causes the dark fringes to be seen, how does an electron, after acting as a wave and then as an electron when it is recieved, interfere with...

Homework Statement http://img141.imageshack.us/img141/1395/40941671kx8.jpg http://img141.imageshack.us/img141/982/82443157pt9.jpg Homework Equations http://img85.imageshack.us/img85/4523/60192566ie7.jpg The Attempt at a Solution I'm not sure where to start with this one. I've...